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Marinette County Sheriff Jerry Sauve said deputies were notified that a robbery at the State Bank of Florence in the Village of Wausaukee early Tuesday afternoon.

Sauve said a man displayed and fired one round from a hand gun and proceeded to rob the bank of cash. The suspect then left the bank in a stolen bank employee’s vehicle. Sheriff’s officers and several other law enforcement officers responded to the scene and area looking the suspect and stolen vehicle.

Less than an hour later, another call was received about a male victim found along Jermac Road. just east of Wausaukee near a pick-up truck that was still running. Arriving officers found 59-year-old Thomas C. Christ dead at the scene. Officers then searched the area and located the stolen vehicle from the bank. A sweep of the area continued and police believed the suspected bank robber had fled in another vehicle and may have encountered the victim and shot him.

Sauve said the FBI, state of Wisconsin Department of Justice agents and the aheriff’s officers put out an alert to law enforcement.

Snyder's vehicle was then spotted in Fond du Lac, where Casper and Snyder confronted one another.

State Patrol talked to the media Wednesday afternoon. They said Casper spotted the car Snyder was in and followed it.

Casper called fellow troopers for backup, who witnessed the confrontation between Casper and the suspect.

“I did get on scene and shortly thereafter the gunfire exchanged between himself and the suspect, and I'm not prepared to comment any further than that because I don't want to jeopardize the investigation that's ongoing,” Wisconsin State Patrol Capt. Anthony Burrell said.

Fond du Lac firefighters rushed to the scene and tried to save the trooper’s life. They told WISN 12 News it's a call they will never forget.

Fire chief Peter O'Leary said crews tried to revive the trooper in their ambulance.

When Flight for Life arrived, medics also worked to save him.

The chief said he didn't personally know Casper but said everyone at the department is grieving the loss.

“We can't emphasize enough how much it hurts us when somebody we work with, somebody we would entrust our lives with, someone we value the way we value our police officers, it’s gonna sting for a long time,” O’Leary said.

Autopsies on both men were performed Wednesday.

"At the Wisconsin Department of Transportation we are grieving the loss of Trooper Trevor Casper," said Department of Transportation secretary Mark Gottlieb. "Trooper Casper was among the group of brave men and women in the Division of State Patrol who put themselves in dangerous situations each day as they work to keep the people of Wisconsin safe. Our thoughts and prayers go out to his family."